I haven't been able to find a diagram of a roof with the exact configuration ours has. I think the board on which our joists rest is called the wall plate but what is the name of the board that sits on the joists and on which the rafters rest?
This is in a garage and I think the plan was to make the roof space bigger for a future conversion because windows are already in place and wiring. The reason I'm asking stems from the fact that I want to sister a couple of joists so I can remove part of one for an opening.